Darn. That solution was so simple, but it breaks posting through the dashboard. You don’t get returned back to the post editing page like you should, you just get a blank white page.
For round two, I edited postie-functions.php and added the:
define(‘SOCIAL_MAIL_PUBLISH’, true);
to the top of the PostToDB function.
Problem with this is it will get overwritten when Postie gets upgraded.
In order for me to get this to work, I added the following definition in wp-config.php:
define(‘SOCIAL_MAIL_PUBLISH’, true);
With this variable set to true, posts sent in through email and the Postie plugin were published to social media automatically.
A side effect of this, which I actually liked, is that ALL posts are published to social media without the popup that was required before.